ABSTRACT
Recovery of motile spermatozoa from extremely low quality samples for use in the intracytoplasmic sperm injection (ICSI) procedure is difficult. To solve this problem we developed a simple method to recover the motile spermatozoa using a 3% polyvinylpyrrolidone (PVP) droplet. After depositing a sperm pellet into this slightly viscous droplet, motile spermatozoa readily swam out to the clear area while immotile spermatozoa dispersed to a lesser extent, so that motile and immotile cells became clearly separated from each other. A total of 36 ICSI cycles using spermatozoa with extremely low quality characteristics were performed. We recovered the motile spermatozoa from all sperm samples from two sources of poor quality spermatozoa. Thirty-one cycles of ICSI with ejaculate resulted in fertilization and pregnancy rates of 54 and 29% respectively. Five cycles of ICSI with frozen-thawed epididymal spermatozoa resulted in fertilization and pregnancy rates of 70 and 60% respectively. The 3% PVP droplet method is very simple and easy to perform, so it may be useful for recovering the motile spermatozoa from extremely low quality sperm samples used for ICSI.
Subject(s)
Cell Separation/methods , Infertility, Male/therapy , Sperm Motility , Cytoplasm , Female , Fertilization in Vitro/methods , Humans , Infertility, Male/pathology , Infertility, Male/physiopathology , Male , Microinjections , Pregnancy , Spermatozoa/pathologyABSTRACT
CCA and D-penicillamine enhanced the NK activity of human lymphocytes in vitro incubation. ADCC activity of the lymphocytes was increased slightly by D-penicillamine but not by CCA. CCA enhanced interferon production from lymphocytes but D-penicillamine did not.
